Tool-retainer.



VV. A. SMHH,

TOOL RETAINER.

APPLxc/JION FILED Aue.29.1916.

am 9,59%@ 'ssamm Jan. 16, 191?.

2 SHEETS-SHEET 1.`

atto/ouml? VV. A. SMITH.

TOOL RETAINER.

APPLlCATloN man Auf..2s,191.

Patented Jan. 16, 1917 2 SHEETS-SHEET 2.

www

l PUT@ STATES VILLIAIW A. SMITH, F DENVER, COLRAD, ASSGNGR T0 THE BEHVER 33.00.75'. EDGLL'L MANUFACTURING COVIPANY, OF DENVER, CGLBADO, A COR'EDEATKN GIS Eit WARE.

TDSL-RETAINER.

Specification of Letters Patent.

Patente-d Jan. lfd., llatr.

To all 'whom t may concern.

Be it known that l, WILLIAM. A. SMITH, a citizen of the United States, residing at Denver, in the county of Denver and State of Colorado, have invented certain new and useful Improvements in Tool-Retainers, of which the following is a specification.

rlhe present invention relates to tool retaining means, and while particularly intended for rock drills, is not necessarily limited thereto.

One of the primary objects of the present invention is to provide a simple, practicable and effective structure, which will retain a tool in its holder, and yet allow the necessary'play of the latter for operating purposes, the device thus being especially use ful in connection with hammers of the luid pressure operated type. Y

A further object is to provide elements which. form a part of the retaining means, and which will effectively secure said retaining means in its operative or its inoperative position, so that the apparatus may be used with the retaining-means in either position.

An embodiment of the invention is illustrated, in the accompanying drawings, Whereinz Figure l is a side elevation` of a portion of the apparatus showing the retainer in place. Fig. 2 is a bottom plan view of the same. Fie. 3 is a front elevation. Fig. 4 is a detail sectional view through one of the ears.

Similar reference numerals designate corresponding parts in all the figures of the drawings.

In the embodiment illustrated, a motor head 5 is disclosed, which constitutes a tool holding member, beingprovided with `the usual socket to loosely receive a tool, a portion of such tool being shown at 6 and being in the form of a drill bit. This tool has an annularenlargement 7 which not only limits the inward movement of the tool into the holding member 5, but is also adapted to be engaged by the tool retainer hereinafter described. The tool holding member 5 is provided on opposite sides with outstanding integral, and therefore fixed ears B, each having an opening 9 therethrough und which as shown in Fig. 3 comprises a contracted central portion with flaring mouths. The front face of each ear is furthermore provided with angular-ly disposed faces 10 ciently small to insure the cross head engaged by the enlargement 7, said ment being located between or bar ll and the front end or ing member l e cross li Secured in. the cross head or be. are rearwari R ing arms 16 that are outwardly ci to escape the tool-holding niernbe arms passing through openings the ears 8 and pivotally the that 'they swing on an airis transverse i tool holding member 5, and conse to a tool7 as 6, placed in sai will be seen that the flaring the opening 9, as illustrated in l mits this pivotal movement. The arms 16 are provided with ments i7 forming ranged to bear against the sea accordingly as the tool retain swung to its operative or ino tion, and washers l mounted on i'zheA portions of the arms i6, are ,like arranged to bear against the seat These washers are yieldingly 11.2 ing position by coiled springs nio the rear ends of the arms and held by `washers 2O and nuts 2l, nuts., being secured against accidental disnmcev ment by pins 2O. A it will be obvious that this cons is very simple and it is also tl tical. When the tool ret disposed in the position sho f i in the drawings it will allow play of the tool, but will prev-en detachment from the tool holding u il' struck by the enlargement Z t A19 permit it to afford a yieldii to the blow. lr' the retaining` swung to the position shown indotted it is positively held in said position, by being disposed out of a swinging" 'to :L 'too member :und

sed substautuly Y Smil mol, of fue @ha moisi* Set orth,

/ if, sidablj/ :md pvpeuing, saf demen mmfsment on 'im ms holding member., and

y resisuf such sliding )matias @if the chars-c5617 forth, 'ng mb lbal having an ea prf '-h un o )Quinny n, i003. e'nainngmemin Sidubly pasing through Swingin haien on an axis P22 Cim: am, v

:s 100i huldng mcmm having .xed 'elements m1 oppsfsrl@ pmwmne thereof provlded Wlth @wing fixed alemania mi provided wltb. mg )fake having 1d @mugs and www; for* smid open- ;ng :Voka harvng' against the rear C w 1 a. m01 retaining l 

